¿Es posible cambiar el límite establecido (Android)?

I followed the below steps on child's device but it then it shows a PIN code on child's device that I am supposed to enter on child's device. Please advice what to do now. 

Also, on the child's device, open the "Parental Control Kroha" app -> Three dots -> click the "Change parental restrictions" button -> enter the PIN code -> If any setup guide appears, follow it.

Then check if the data in the "Parental Control Kroha" app is updated.